mysql - DELETE JOIN 出现问题

Question

DELETE FROM Books INNER JOIN (Classes, Class_Books) ON (Books.ISBN = Class_Books.ISBN AND Class_Books.Class_ID = Classes.Class_ID AND Classes.Term_ID = 63) WHERE Year = '""'

给出错误:#1064 - 您的 SQL 语法有错误；

用 SELECT 替换 DELETE 效果很好

Answer 1

尝试以下操作，这将删除 Classes.Term_ID = 63 的图书中的记录。

DELETE b FROM Books b
    INNER JOIN Class_Books cb ON b.ISBN = cb.ISBN
    INNER JOIN Classes c ON cb.Class_ID = c.Class_ID  
WHERE Year = '""' 
  AND c.Term_ID = 63